jobborn



(Model.) 3 Sheets-Sheet 1. M. JOBBORN.

COMBINED LATCH AND LOOK.

No. 377,200. Patented Jan. 31, 1888.

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(Model.) 3 Sheets'Sheet 2. M. JOBBORN.

COMBINED LATGH AND LOCK. No. 377,200. Patented Jan. 81, 1888.

vffiiornez N. PETERS. Pijalu-llihognphar, Washington D. c.

3 Sheets-Sheet 3.

(ModeL) M. JOBBORN.

COMBINED LATCH AND LOCK.

Patented Jan. 31, 1888.

N PETERS Phizlwljlhogrnphcr. Washington. D. C.

ilNirs STATES Arena. Orrrcs.

MOSES JOBBORN, OF HAMILTON, ONTARIO, CAN ADA, ASSIGNOR TO JOHN H. TILDEN, OE SAME PLACE, AND GEORGE B. UNDERVOOD, OF TORONTO,

CANADA.

COMBINED LATCH AND LOCK.

SPECIFICATION forming part of Letters Patent No. 377,200, dated January 31, 1888.

Application filed August 10 1867.

To all whom it may concern.-

Be it known that I, MOSES JOBBORN, of the city of Hamilton, in the Province of Ontario, in the Dominion of Canada, have invented certain new and useful Improvements in a Combined Latch and Look, and I do hereby declare that the following is a full, clear, and eX- aet description of the same, reference being had to the annexed drawings, in which- Figure l is a plan of the interior of the lock, showing all the parts in unlocked position. Fig. 2 is a like View of the same, the tumblers removed to clearly shew the parts underneath. Fig. 3 is a plan of the upper part of the lock, showing the latch-bolt locked by a thumbknob from the inside of a door. Fig. 4 is a plan showing posit-ion of parts when the lockholt is projected, and which also prevents re traction of the latch-bolt. Fig. 5 is a plan showing the position of parts when operated by a night-key from the outside to retract the latclrbolt after being locked from the inside.

My invention relates to locks in which the latch-bolt is projected by a gravitating lever; and the object of my invention is to construct and combine the parts whereby the latch-bolt will be locked by the lock-bolt on being projected by a key, and when the lock-bolt is retracted the latch-bolt can be locked by a slide from the inside of the door and unlocked by a night-key from the outside, all as hereinafter described.

1 is the case of the lock, which is provided with a cover secured by screws entering post 2 and log 3, cast integrally with the case.

4 is the latch-bolt, and 5 the spindle-tappet, independently journaled in the lock-case and engaging with lugs 6 on the latchbolt, so that by turning the knob-spindle either way the bolt will be retracted.

7 is the gravitating elbow-lever to project the latch-bolt by one end of said lever engaging the end of the bolt, and 8 is the lock-bolt projected by a key entered at the key-hole 9. The lock-bolt 8 is provided with a hook projection, 10, at the upper edge, which, when the bolt is projected, engages a similar projection at the lower edge of the gravitating lever 7, to lock the lever and thus prevent retraction of Serial No. 246,731. (Model.)

the latch-bolt. Both bolts and lever being locked together, give additional security.

11 is a slide having a crooked end to engage with a groove in the tappet 5, so that when in contact the tappet will be locked and the spindle-knobs be prevented from turning, and the latch-bolt cannot then be retracted by the knobs. Slide 11 is operated by a cam, 12, on a hollow shaft, 13, journaled in the lock casing and cover, and the hollow shaft is rocked to retract latch-bolt 4 from the inside by a thumbkuob having a bit to enter the shaft through a hole in a plate secured to the inside of the door. In placing the lock on a door the door must be left intact on the outside opposite to the hollow shaft 13, to prevent retraction of the latch'bolt by a key entering the hollow shaft from the outside.

The object in looking the spindle-tappet 5 is to prevent the latch-bolt being retracted by turning the knobs and yet allow it to retract by a key entered at the key-hole 15.

16 is a slide operated by a key entered at keyhole 15, and said slide, by a turn at one end, engages with a fin, 17, projecting from latch-bolt 4. After the bolt has been retracted by the slide gravitating lever 7, then projects latch-bolt 4, and slide 16 moves with the latchbolt. Vhen the lock-bolt engages the gravitating lever, as before described, the slide 16 cannot be operated by a key, and thus, if the keyhole 9 is not continued through the door, the lock could not be unlocked from the outside of the door until the lock-bolt 8 is retracted by the key on the inside of the door.

19 are gravitating tumblers pivoted on a post, 20, cast with the lockcase, and have a teat projection which bears on the upper edge of the gravitating lever 7 to give additional weight to the lever, whereby it will project the latch bolt with greater power and the tumblers will offer resistance to the keys.

The tumblers have slots 21 to receive post 22 of the lockbolt, to prevent the bolt being forced back without lifting the tumblers. The tumblers have an opening, 25, opposite keyhole 15, and slots 23 to receive post 24 of slide 16, so that when a key is turned in keyhole 15 the tumblers will be raised and the latchbolt retracted. Post 24 prevents the slide from moving until the tumblers and slide are operated simultaneously by a key.

I claim as my invention-,

1; In a lock and latch, the combination, with the latch-bolt 4, of slide 11, shaft 13, having cam 12, tappet 5, slide 16, gravitating lever 7, and tumblers 19, whereby the tappet can be locked from the inside of the door and the no latch-boltretracted from without by a key, as

set forth.

2. In a latch and lock, the combination of the latch-bolt 4, tappet 5, gravitating lever 7, having a projection on the lower edge thereof, 15 lock-bolt 8, having a projection, 10, and tumblers 19, whereby the advancement of the lockbolt by a key locks latch-bolt 4 by engagement with the lever, as set forth. 7

3. The combination, with the case 1, of

shaft 13, having cam 12, slide 11, tapp'et 5, 2o,

gravitating lever- 7, slide 16, tumblers 19, and lock-bolt 8, whereby the tappet can be locked from the'inside of the door, the latchebolt retracted from the inside and outside'by a key,

and from the inside by a thumb-knob, as set 25 MOSES JQBBORN. [-L. s.]

Witnesses:

ALEXANDER SMITH, J AMES CAHILL. 

